在C#中如何读写INI文件

//写INI文件
[ DllImport ( "kernel32" ) ]
private static extern bool WritePrivateProfileString ( string section ,string key , string val , string filePath ) ;
//读ini文件（字符
[ DllImport ( "kernel32" ) ]
private static extern int GetPrivateProfileString ( string section ,string key , string def , StringBuilder retVal ,int size , string filePath ) ;
//读ini文件（数字
[ DllImport ( "kernel32" ) ]
private static extern int GetPrivateProfileInt ( string section ,string key , int def , string filePath ) ;
//////////////////////////////////////////////////////////////
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
namespace EchonComponentLibrary
{
///

/// IniFile 的摘要说明。
///

public class IniFile
{
private string FFileName;
[DllImport("kernel32")]
private static extern int GetPrivateProfileInt(
string lpAppName,
string lpKeyName,
int nDefault,
string lpFileName
);
[DllImport("kernel32")]
private static extern int GetPrivateProfileString(
string lpAppName,
string lpKeyName,
string lpDefault,
StringBuilder lpReturnedString,
int nSize,
string lpFileName
);
[DllImport("kernel32")]
private static extern bool WritePrivateProfileString(
string lpAppName,
string lpKeyName,
string lpString,
string lpFileName
);